D-Link AirPlus G+ DI-824VUP+ Manual page 60

Using the Configuration Menu
Tools > Misc (Continued)
UPnP
VPN Pass-
Through
Non-standard
FTP port
UPnP is short for Universal Plug and Play which is a networking
architecture that provides compatibility among networking equipment,
software, and peripherals. The DI-824VUP+ is a UPnP enabled router
and will only work with other UPnP devices/softwares. If you do not
want to use the UPnP Functionality, it can be disabled by selecting
"Disabled".
The device supports VPN (Virtual Private Network) pass-through for
both PPTP (Point-to-Point Tunneling Protocol) and IPSec (IP Secu-
rity). Once VPN pass-through is enabled, there is no need to open
up virtual services. Multiple VPN connections can be made through
the device. This is useful when you have many VPN clients on the
LAN.
If an FTP server you want to access is not using the standard port
21, then enter in the port number that the FTP server is using in-
stead.
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